package com.tz.security.service;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;
import org.thymeleaf.util.StringUtils;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

/**
 * @author https://github.com/TianPuJun @醉鱼
 * @ClassName MyUserDetailService
 * @Description
 * @Date 17:51 2020/12/2
 **/
@Service
public class MyUserDetailService implements UserDetailsService {
    /**
     * Locates the user based on the username. In the actual implementation, the search
     * may possibly be case sensitive, or case insensitive depending on how the
     * implementation instance is configured. In this case, the <code>UserDetails</code>
     * object that comes back may have a username that is of a different case than what
     * was actually requested..
     *
     * @param username the username identifying the user whose data is required.
     * @return a fully populated user record (never <code>null</code>)
     * @throws UsernameNotFoundException if the user could not be found or the user has no
     *                                   GrantedAuthority
     */
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        List<GrantedAuthority> authorities = new LinkedList<>();
        UserDetails user =
                User.withDefaultPasswordEncoder()
                        .username(username)
                        .password("password")
                        .roles("USER")
                        .authorities(authorities)
                        .build();
        if (StringUtils.equalsIgnoreCase("admin", username)) {
            authorities = AuthorityUtils.commaSeparatedStringToAuthorityList("admin");
        } else {
            authorities = AuthorityUtils.commaSeparatedStringToAuthorityList("test");
        }
        return new User(username, user.getPassword(), user.isEnabled(),
                user.isAccountNonExpired(), user.isCredentialsNonExpired(),
                user.isAccountNonLocked(), authorities);
    }
}
